« Back to Glossary Index

Markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable widely used for the representation of arbitrary data structures such as those used in web services.

Synonyms:
XML
Extensible Markup Language (Wikipedia)
XML
XML.svg
Filename extension.xml
Internet media type
  • application/xml
  • text/xml
Uniform Type Identifier (UTI)public.xml
UTI conformationpublic.text
Developed byWorld Wide Web Consortium
Type of formatMarkup language
Extended fromSGML
Extended to
Standard
Open format?Yes
Extensible Markup Language (XML)
StatusPublished
Year started1996; 23 years ago (1996)
Editors
Related standardsXML Schema
DomainData serialization
AbbreviationXML
WebsiteXML 1.0

Extensible Markup Language (XML) is a markup language that defines a set of rules for encoding documents in a format that is both human-readable and machine-readable. The World Wide Web Consortium's XML 1.0 Specification of 1998 and several other related specifications—all of them free open standards—define XML.

The design goals of XML emphasize simplicity, generality, and usability across the Internet. It is a textual data format with strong support via Unicode for different human languages. Although the design of XML focuses on documents, the language is widely used for the representation of arbitrary data structures such as those used in web services.

Several schema systems exist to aid in the definition of XML-based languages, while programmers have developed many application programming interfaces (APIs) to aid the processing of XML data.

« Back to Glossary Index